Upbeat Audio T613-BMC Boostaroo 3 Channel Amplifier and Splitter Unique Portable Pocket Amplifier For Personal Audio Devices & Laptops Unique Portable Pocket Amplifier For Ipod Separates Audio Signal Into Individual Stereo Channels To Drive 3 Separate Headsets Or Speakers Solves The Problem Of Low Volume From Ipods Weight (with 2 AA batteries) - 6 oz